I just started a stack to mess with this new feature, and I'm shooting for damage. My base stat is 40 points into damage, first mutation is 42, swapped the male in, (yes I swapped the old male out) now the incubator is keeping 42 point melee eggs instead of destroying them for 44 point melee eggs. My understanding is it should be destroying eggs with stats that are equal to the parents and keeping ones that have higher stats. Both parents are in the world, I play on a dedicated server not a single player game. The parents are also 3 foundations away from the incubator itself. Happy to post screens if need be. Any ideas on how to fix this would be much appreciated